body{
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    font-size: 18px;
}

.header{
    background-color: #f4f4f4;
    border-bottom: #ccc 3px solid;
    padding: 20px;
}

.container{
    width: 700px;
    margin: 30px auto;
}
